I think it's option four because as far as I know, red/green color blindness is an example of a recessive, sex-linked trait (encoded on the X chromosome), which results in much more men to suffer from it than women.
Hope that helps!
The main site of red blood cell production is the liver.
They would have black and white because grey shows up as lavender or blue in a chicken and it can’t be black or white because it says BW that is together so it would have to be black and white
